I folded the lunch bag up to approximately 2" from the top to form a pocket. Then glued some Christmas scrapbook paper on the pocket section. Sewed around the three sides to secure the pocket and popped the gift card inside.
I then selected a miniature which reflected their interests, in this case a motor bike and secured it to the outside of the holder with a red brad.
To keep everything closed, I made a slider from more Christmas paper onto which I had sewn a Christmas button.
Bright and cheery, and an inexpensive way to give a gift card.